Redmine

I've attached a patch that adds an API for querying against the user database.

1. User ID
2. Login
3. Email
4. First name
5. Last name

URL Examples:
All Users: http://redmine.org/users.xml
Specific User: http://redmine.org/users.xml?status=1&name=akaplan%40nytimes.com
No User: http://redmine.org/users.xml?status=1&name=BOB

Format:

<?xml version="1.0" encoding="UTF-8"?>
<users type="array">
  <user id="4">
    <first>Redmine</first>
    <last>Admin</last>
    <login>admin</login>
    <mail>foo@nytimes.com</mail>
  </user>
  <user id="4">
    <first>Adam</first>
    <last>Kaplan</last>
    <login>adamkaplan</login>
    <mail>akaplan@nytimes.com</mail>
  </user>
</users>